Addex completes first part of Phase I levodopa associated dyskinesia study

Part one was a randomized two-way crossover comparison study in 12 healthy subjects to test the pharmacokinetics, safety and tolerability of the original active pharmaceutical ingredient in capsule with the modified release capsule. The modified release formulation achieved the predefined pharmacokinetic criteria required to continue into part two. Tolerability and safety monitoring parameters also supported continuing the trial.

Part two is a double-blind, placebo-controlled, multiple ascending, repeat dose study in 24 healthy subjects to test the safety, tolerability and pharmacokinetics of three different doses of the modified release formulation.

Addex also has initiated a separate Phase I crossover trial to study ADX48621 interactions with gender and food in about 15 older healthy male and female subjects. Top-line data from both trials are expected by end of 2008.

ADX48621 is scheduled to start a Phase IIa proof of concept study for the treatment of levodopa associated dyskinesia in Parkinson’s disease during the first half of 2009.

Charlotte Keywood, chief medical officer of Addex, said: “we are pleased by the progress of ADX48621 and are preparing to start the Phase IIa proof of concept trial to study its utility in Parkinson’s disease dyskinesia in 2009.”